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					Additional file 3: Terms that will identify in Ovid MEDLINE systematic reviews and
studies that mention low- and middle-income countries

1. Developing Countries/
2. Medically Underserved Area/
3. Africa/ or "Africa South of the Sahara"/ or Asia/ or South America/ or Latin America/ or
Central America/
4. (Africa or Asia or South America or Latin America or Central America).tw.
5. (American Samoa or Argentina or Belize or Botswana or Brazil or Bulgaria or Chile or
Comoros or Costa Rica or Croatia or Dominica or Equatorial Guinea or Gabon or Grenada or
Hungary or Kazakhstan or Latvia or Lebanon or Libya or Lithuania or Malaysia or Mauritius or
Mexico or Micronesia or Montenegro or Oman or Palau or Panama or Poland or Romania or
Russia or Seychelles or Slovakia or South Africa or "Saint Kitts and Nevis" or Saint Lucia or
"Saint Vincent and the Grenadines" or Turkey or Uruguay or Venezuela or Yugoslavia).mp. or or or or or Northern Mariana or Russian or or or Slovak or "St Kitts and Nevis".tw. or
St or "St Vincent and the Grenadines".tw. [UMIC]
6. (Albania or Algeria or Angola or Armenia or Azerbaijan or Belarus or Bhutan or Bolivia or
"Bosnia and Herzegovina" or Cameroon or China or Colombia or Congo or Cuba or Djibouti or
Dominican Republic or Ecuador or Egypt or El Salvador or Fiji or "Georgia (Republic)" or
Guam or Guatemala or Guyana or Honduras or Indian Ocean Islands or Indonesia or Iran or Iraq
or Jamaica or Jordan or Lesotho or "Macedonia (Republic)" or Marshall Islands or Micronesia or
Middle East or Moldova or Morocco or Namibia or Nicaragua or Paraguay or Peru or
Philippines or Samoa or Sri Lanka or Suriname or Swaziland or Syria or Thailand or Tonga or
Tunisia or Turkmenistan or Ukraine or Vanuatu).mp. or or Cape or or or or or or Marshall
or or Syrian Arab or West [LMIC]
7. (Afghanistan or Bangladesh or Benin or Burkina Faso or Burundi or Cambodia or Central
African Republic or Chad or Comoros or "Democratic Republic of the Congo" or Cote d'Ivoire
or Eritrea or Ethiopia or Gambia or Ghana or Guinea or Guinea-Bissau or Haiti or India or
Kenya or Korea or Kyrgyzstan or Laos or Liberia or Madagascar or Malawi or Mali or
Mauritania or Melanesia or Mongolia or Mozambique or Myanmar or Nepal or Niger or Nigeria
or Pakistan or Papua New Guinea or Rwanda or Senegal or Sierra Leone or Somalia or Sudan or
Tajikistan or Tanzania or East Timor or Togo or Uganda or Uzbekistan or Vietnam or Yemen or
Zambia or Zimbabwe).mp. or or or or or North or Salomon or Sao or or Viet [LIC]
8. ((rural or remote or nonmetropolitan or underserved or under served or deprived or shortage)
adj (communit$ or count$ or area? or region? or province? or district?)).tw.
9. ((developing or less$ developed or third world or under developed or poor$) adj (communit$
or count$ or district? or state? or province? or jurisdiction? or nation? or region? or area? or
10. ((middle income or low income or underserved or shortage) adj (communit$ or count$ or
district? or state? or province? or jurisdiction? or nation? or region? or area? or territor$)).tw.
11. (lmic or lmics).tw.
12. or/1-11

6498cddc-4e21-4c00-9d74-38143de4aad5.doc   1
1.The filter is based on the World Bank country list of upper-middle- income economies (UMIC),
  lower- middle- income economies (LMIC), and low- income economies (LIC), which is
  available at the following URL:,,contentMDK:204214

6498cddc-4e21-4c00-9d74-38143de4aad5.doc   2

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